Alternative Parts

  • LTC4020
    LTC4020

    55V Buck-Boost Multi-Chemistry Battery Charger

Overview

Features and Benefits

  • Charger Input Voltage May Be Higher, Equal to or Lower Than Battery Voltage
  • Charges Any Number of Cells Up to 20V
  • 1% Voltage Accuracy for Rechargeable Lithium Batteries
  • 100mV Current Sense Voltage for High Efficiency (LT1513)
  • 0mV Current Sense Voltage for Easy Current Programming (LT1513-2)
  • Battery Can Be Directly Grounded
  • 500kHz Switching Frequency Minimizes Inductor Size
  • Charging Current Easily Programmable or Shut Down

Product Details

The LT1513 is a 500kHz current mode switching regulator specially configured to create a constant- or programmable-current/constant-voltage battery charger. In addition to the usual voltage feedback node, it has a current sense feedback circuit for accurately controlling output current of a flyback or SEPIC (Single-Ended Primary Inductance Converter) topology charger. These topologies allow the current sense circuit to be ground referred and completely separated from the battery itself, simplifying battery switching and system grounding problems. In addition, these topologies allow charging even when the input voltage is lower than the battery voltage. The LT1513 can also drive a CCFL Royer converter with high efficiency in floating or grounded mode.

Maximum switch current on the LT1513 is 3A. This allows battery charging currents up to 2A for a single lithium-ion cell. Accuracy of 1% in constant-voltage mode is perfect for lithium battery applications. Charging current can be easily programmed for all battery types.

Applications

  • Charging of NiCd, NiMH, Lead-Acid or Lithium Rechargeable Cells
  • Precision Current Limited Power Supply
  • Constant-Voltage/Constant-Current Supply
  • Transducer Excitation
  • Universal Input CCFL Driver

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

LTspice

Models for the following parts are available in LTspice:

LT1513
LT1513-2

Product Recommendations

LT1513 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Discussions

LT1513 Discussions

Re: LT1513 Charge current (problems)
13 week(s) ago in Power By Linear
Re: LT1513 Charge current (problems)
13 week(s) ago in Power By Linear
LT1513 Charge current (problems)
16 week(s) ago in Power By Linear
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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